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30990006a9
This reduces chances of errors where consumers of strings mutate inputs and reduces memory usage of the app. Test suite passes now, but there may be some stuff left, so we will run a few sites on a branch prior to merging
86 lines
1.8 KiB
Ruby
86 lines
1.8 KiB
Ruby
# frozen_string_literal: true
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require_dependency 'retrieve_title'
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class InlineOneboxer
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MIN_TITLE_LENGTH = 2
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def initialize(urls, opts = nil)
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@urls = urls
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@opts = opts || {}
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end
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def process
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@urls.map { |url| InlineOneboxer.lookup(url, @opts) }.compact
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end
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def self.purge(url)
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Rails.cache.delete(cache_key(url))
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end
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def self.cache_lookup(url)
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Rails.cache.read(cache_key(url))
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end
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def self.lookup(url, opts = nil)
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opts ||= {}
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opts = opts.with_indifferent_access
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unless opts[:skip_cache] || opts[:invalidate]
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cached = cache_lookup(url)
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return cached if cached.present?
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end
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return unless url
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if route = Discourse.route_for(url)
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if route[:controller] == "topics" &&
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route[:action] == "show" &&
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topic = Topic.where(id: route[:topic_id].to_i).first
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return onebox_for(url, topic.title, opts) if Guardian.new.can_see?(topic)
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end
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end
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always_allow = SiteSetting.enable_inline_onebox_on_all_domains
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domains = SiteSetting.inline_onebox_domains_whitelist&.split('|') unless always_allow
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if always_allow || domains
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uri = begin
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URI(url)
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rescue URI::Error
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end
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if uri.present? &&
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uri.hostname.present? &&
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(always_allow || domains.include?(uri.hostname))
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title = RetrieveTitle.crawl(url)
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title = nil if title && title.length < MIN_TITLE_LENGTH
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return onebox_for(url, title, opts)
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end
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end
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nil
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end
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private
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def self.onebox_for(url, title, opts)
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onebox = {
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url: url,
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title: title && Emoji.gsub_emoji_to_unicode(title)
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}
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unless opts[:skip_cache]
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Rails.cache.write(cache_key(url), onebox, expires_in: 1.day)
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end
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onebox
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end
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def self.cache_key(url)
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"inline_onebox:#{url}"
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end
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end
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